A number of criticisms have arisen relating to the campaign,accusing it of being self-congratulatory focusing primarily on fun rather than donating money to charity. Many people also declined the challenge stating that most of money that is donated to ALS Association "is going into the pockets of Big Pharma", which is already doing ALS research. It would be better to actually help someone with ALS and donate money directly to ALS patients. Some people refused to take part in the challenge because of the use of animal experimentation in ALS research which uses embryonic stem cells in its ALS research. Some people have also targeted the waste of water, especially in California, due to that region's ongoing drought. However, some celebrities including Justin Timberlake and Opra Winfrey and billionaires like Bill Gates believe in the challenge and contribution. They think that is not only fun but also practical because it is benefitcial to ALS researchers. Though the viral nature of the Ice Bucket Challenge isn't sustainable, it has succeeded in promoting an understanding of the full scope of ALS.